Improvement in grain-separators



D. E. FISHER.

GIRAIN-SEIRARA'IOR.

Patented June 13, 1876.

all/ll! N4 FETERS. PHOTO-UTHDGRAPHER. WASI'HNGTON. D C.

, tion.

UNITED STATES PATENT OFFICE.

DAVID E. FISHER, OF PATTERSON, OHIO.

IMPROVEMENT IN GRAlN-SEPARATORS.

Specification forming part of Letters Patent No. 178,62 1, dated June13, 1876; application filed January 15, 1876.

To all whom it may concern:

Be it known that 1, DAVID E. FISHER, of Patterson, in the county ofHardin and State of Ohio, have invented a new and Improved Fanning-Mill,of which the following is a specification:

The invention relates to that class of fanning-mills which are providedwith shaking screens; and it consists in novel devices for operating orshaking the screen-shoe, as will he hereinafter more fully set forth.

Figure 1 is a longitudinal sectional elevation of the improvedfanning-mill, taken on the line a; at of Fig. 2. Fig. 2 is a fronteleva- Fig. 3 is a side elevation. Fig. 4 is a transverse section of thejar; and Fig. 5 is a detail section, showing the contrivance for shakingthe shoe.

Similar letters of reference indicate corresponding parts.

The shoe A has short rods B attached to the sides, and supporting it onthe rollers O, which are adjustably attached to the sides D of theniachine by slotted boxes E and screws 13, so that the shoe can beshifted at one or both ends, to vary the height for different kinds ofgrain. These short rods only extend from the sides of the shoe outward,and not across over the sieves, as in previous arrange ments formounting the shoes on rollers, and so do not clog the sieves. Theimprovement of the jar consists in making it of a rounddifferentially-ribbed and eccentrically-mounted block or cam, G, on ashaft, H, to be shifted around to difi'erent positions, so that thelarger or smaller parts of the ribs will act on the toothed plate I,according as light or heavy jars are required, and the cam is arrangedto act directly on the screen J, so as to work it without interferingwith the screen. A ratchet and pawl, K, are combined with the jar-shaftto hold it in position. L is a valve arranged between the fan and thescreen to regulate the blast on the latter. The shaft extends outside ofthe case of the machine, and has a handwheel, M, outside for turning it.The screen is made of two sheets of wire-cloth, I), attached to theupper and lower sides of the screenframe, so as to obtain double screencapacity within the space of one screen.

The eccentric form of the cam or jar enables it to be adjusted to theshoe as it is shifted up or down to vary the inclination of the sieves.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- The differentially-ribbed and eccentricallymountedrevolving cam or block G, combined with the shoe or screen of afanning-mill, substantially as specified.

DAVID E. FISHER.

Witnesses:

EUGENE M. YOUNG, SoLoMoN O. OoLToN.

